UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 62
UPD78F9234MC-5A4-A
Manufacturer Part Number
UPD78F9234MC-5A4-A
Description
MCU 8BIT 8KB FLASH 30PIN
Manufacturer
Renesas Electronics America
Series
78K0S/Kx1+r
Datasheet
1.UPD78F9232MC-5A4-A.pdf
(419 pages)
Specifications of UPD78F9234MC-5A4-A
Core Processor
78K0S
Core Size
8-Bit
Speed
10MHz
Connectivity
LIN, UART/USART
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
24
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
UPD78F9234MC-5A4-A
Manufacturer:
MAXIM
Quantity:
1 001
Part Number:
UPD78F9234MC-5A4-A
Manufacturer:
NEC
Quantity:
20 000
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4.2.4
port mode register 4 (PM4). When the P40 to P47 pins are used as an input port, an on-chip pull-up resistor can be
connected in 1-bit units by using pull-up resistor option register 4 (PU4).
output.
60
Port 4 is an 8-bit I/O port with an output latch. Each bit of this port can be set to the input or output mode by using
The P41 to P44 pins can also be used for external interrupt request input, serial interface data I/O, and timer
Generation of reset signal sets port 4 to the input mode.
Figures 4-8 to 4-11 show the block diagrams of port 4.
Port 4
WR
PU4:
P4:
PM4:
RD:
WR
WR
WR
RD
PORT
PM
PU
Also, since the option byte is referenced after the reset release, if low level is input to the RESET
pin before the referencing, then the reset state is not released. When it is used as an input port
pin, connect the pull-up resistor.
: Write signal
Pull-up resistor option register 4
Port register 4
Port mode register 4
Read signal
(P40, P45 to P47)
PM45 to PM47
PU45 to PU47
Output latch
PU40,
PM40,
PM4
PU4
P4
Figure 4-8. Block Diagram of P40, P45 to P47
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17446EJ5V0UD
V
DD
P-ch
P40, P45 to P47
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